Machine for cutting picture-mats.



No. 997,997. Patented Apr. 22, I902.

- P. DRINKAUS.-

MACHINE FOR bUTTING PICTURE MATS:-

(Applieatio n filed Jul 12, 1901.)

(No Model.)

I JV VENT OR.

UNrrnD STATES PATENT OFFICE.

il/IACHINE FOR CUTTING PICTURE-MATS.

SPECIFICATION forming part To all whom it may concern:

Be it known that L'PHILLIPP DRINKAUS, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Machines for Cutting Picture-Mats, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in machines for cutting picture-mats, and relates more particularly to that type of machine used for cutting circular or elliptical openings in mats used in the framing of pictures, but being capable of other uses.

The object of the present invention is to make a machine which can be readily adjusted, shall have a wide range of adjustment, be simple, strong, inexpensive, and easy to operate, and by means of which either circular, elliptical, or apertures of other form may be automatically cut of any desired size irrespective of the thickness of the cardboard mat.

With the above and other objects in View the invention consists in the novel combination and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claims.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification,and Wherein like letters of reference indicate corresponding parts throughout the several views, in Which- Figure 1 is a plan view of myimproved matcutter as in use. Fig. 2 is a side elevation thereof, showing the work table in section. Fig. 3 is a perspective View of one of the extension-slides. Fig. 4 is a perspective view of the circular guide-block in which the slides travel. Fig. 5 is a plain view of the centering-plate adapted to be let into the face of the work-table. Fig. 6 is a perspective view of a modified construction of knife and knifeholder. Fig. ting-knife.

' As shown in the drawings, A is the worktable, into the center of which is let the plate 7 is a side elevation of the cutof Letters Patent No. 697,997, dated April 22, 1902. Application filed y 1 1901,

Serial No. 67,937. (No model.)

B, provided with apertures a and the centering-pin b.

0 represents lines intersecting each other at right angles and passing through the center of the pin 1), so that the sheet of matting hold the guide-block in fixed relation to the work to be cut.

E E are mortises cut in the face of the guide-block, intersecting each other at right angles at the center of the block and having the appearance in cross section of a cross. F F are slides traveling in said guides or mortises at right angles to each other and are provided with the screw-threaded vertical pins 6 e.

G is a flat bar having a slight lateral bend and projecting with its ends on opposite sides of the guide-block, which ends are marked upon their upper face with suitable graduations or scales, preferably in half-inches. is a hole in said bar which the pin e on the slide F is adapted to engage, said pin being provided with a suitable thumb-nut, and g is a slot in the same portion of said bar, in which the pin e on the slide F is adapted to travel, and H is an indicator sliding on said bar, through which the pine also passes, being provided at its upper end with a suitable nut.' h is a pointer on said sliding indicator, and '11 is an internally-screW-threaded aperture in the vertical lug or ear H on said indicator-slide. I is a similar lug or projection fixed on the outer end of the bar G and in which is loosely swiveled the adjusting screw J, engaging with its free end the screw-threaded aperture 2' in the upward extension of the indicator H,

so that by turning said screw the slides F F Will be caused to move in relation to each other, and thereby change the proportion of the major axis, as indicated on the scale by the pointer.

K is the knife-holder, slidingly secured upon the opposite end of the bar G, a setnear its middle, with,

screw j being provided to hold it in any of its adjusted positions, and 7c is an indicator adapted to be used in connection with the ply being used for each different thickness of mat.

L is the knife-holder proper, integrally formed with the slide and arranged at a slight lateral angle thereto, a suitable presser-foot Z being providedjust inside the cutting-knife.

M is the knife, loosely swiveled in the vertical bearings of the holder, and m is a knurled adjusting-nut having a screw-thread engagement with the stem of the knife, so that the knife may be readily adjusted vertically and still be free to trail with or follow the outline of an oval cut.

I may make the presser-[ootl vertically adjustable or I may make the knife holder proper adjustable, so that different bevels may be cut; but as such constructions are obvious and will readily suggest themselves to those skilled in the art I do not deem it necessary tofurther describe the same.

In Fig. 6 I have shown a modified construction of knife and knife-holder, in which N is the movable holder and O the knife-holder proper, swiveled therein and carrying the knife 01, vertically adjustable therein.

It is obvious that I may make the slides of difierent lengths and the guide-blocks of varying sizes according to the sized openings desired to be cut with each machine, and I pref-,

. erably furnish one extra small guide-block and an extra pair of extension-slides, so that should the work be smaller than that for which the machine was designed the small block could be used and if larger than the regular block can be used with the extensionslides. Thus by only a slight changing of the parts a mat-cutter having a wide range of adjustability can be had. It will also be noticed that the shank of the knife, the pins 6 e, and the longitudinal center of the adj listing-screw are all in the same vertical plane (see Fig. 1) and that the cutting edge of the knife is just back of this line, so that it will trail perfectly. This arrangement is all accomplished by reasonof the lateral bend in the bar G, and by reason of such arrangementI am enabled to cut an ellipse which is perfectly true.

By moving the slide K and the indicatorslide H in relation to each other along the bar G an ellipse of any predetermined proportion or size may be accurately cut. It will also be seen that by having the guide-grooves E E of peculiar. cross-section the open space at theirintersecting ends is reduced to a minimum and the slides are more accurately guided in said grooves.

What I claim as my invention is- 1. A machine of the character described, comprising a guide-block in fixed relation to the Work-table, guide-grooves formed in said a different notch in the indicator sim-v block, intersecting each other at right angles, slides traveling in said grooves, a bar pivotally mounted on one of said slides and extending on opposite sides of said block, a slot formed in one arm of said bar, an indicatorslide secured on said arm and connected with the other slide through said slot, means for adjusting said slidein relation to the other slide and a cutter adj ustably mounted on the opposite end of said bar, substantially as described. V

2. In a machine of the character described, the combination with awork-table, ofaguideblock detachably secured thereon, undercut guide-grooves formed in the top of said block and slides traveling in said grooves, a crossbar having a slight lateral bend pivotally connected with said slides, means for adjusting one of said slides in relation to the other, a knife-holder slidingly secu red on the opposite end of said bar, and a vertically-adjustable traveling knife or cutter swiveled in said knife-holder, substantially as described.

3. In a machine of the character described,

the combination with the work-table, of an apertured plate let into the table, a vertical centering-pin, a guide-block having pins reg istering with said apertures, guide-grooves intersecting each other at right angles cut into the top of said block, slides fitting in said grooves, a bar extending across said block and having a laterally-bent portion, said bar being pivotally secured to one of said slides, a longitudinal slot formed in the short arm of said bar, an indicator-slide traveling on said arm, a pin connecting said indicator-slide with the other slide, an adjustable screw loosely swiveled in the outer end of said arm having a screw-thread engagement with said indicator-slide to adjust the slides in relation to each other and a trailing cutter swiveled in a bracket slidingly secured upon the long arm of said bar.

4-. In a machine for providing picture-mats with elliptical openings, the combination with the cutter-bearing bar having graduations marked thereon, a knife and knife-holder carrying a graduated stop slidingly mounted on said bar, whereby one set of graduations may be used for the various thicknesses of mats and suitable means for guiding the knife in the operation of the machine to cause an ellip tical or circular cut to be made in the mat board, all arranged and operating substantially as described. I

5. In a machine of the character described, the combination with a work-table, of a guideblock detachably secured thereon, guides intersecting each other at right angles formed on said block, slides traveling in said guides,

with graduations formed on said bar, a slot and graduations formed in the opposite end of said bar, an indicator registering with said graduations and connected with the other one of said slides and means for adjusting said indicator and slide in relation to the other slide.

6. In a machine of the character described, the combination with a guide-block and slides traveling in grooves formed in said block and intersecting each other at right angles, of a bar having a slight lateral bend extending across said block and pivotally secured to one of said slides, a trailing knife and knifeholder adj ustably secured on one end of said bar, and an indicator pivotally connected with the other slide, secured said bar and means for adjusting the same, the pivot-pins of the slides and the shank of the traveling knife all being in the same vertical plane, while the cutting-point of the knife is in a plane in rear thereof.

on the other'end of a 7. In a machine of the character described,

a central guide-block having intersecting guide-grooves and slides traveling therein, of a cross bar pivotally connected with said slides and projecting on opposite sides of the block, a swiveled knife and knife-holder adj ustably mounted on one end of said bar and an elongated slot formed in the other end of said bar, an indicator slidingly secured on said bar and connected through said slot with one of said slides and an adjusting-screw swiveled in the end of said bar and having a screw-thread engagement with said indicator to adjust the slides in relation to each other. In testimony whereof I aflix my signature in presence of two witnesses.

' PHILLIPP DRINKAUS. Witnesses:

OTTO F. BARTHEL, JOSEPH A. N OELKE. 

